Ex-protection solenoid spool valve for zone 0


Ex-protection solenoid spool valve

The proven spool valves for use in Zone 0 are now available with an extended flow range. This in the nominal sizes NG4 and NG6. The two valves are available in 4/3- and 4/2-way functions and as detented execution. The maximum volume flow increases to 20 l/min with this variant. The valve is also ideal for all types of pilot control functions. It can be operated up to a maximum of 350 bar. If a leakage as low as possible is required, there is the variant with minimized leakage of less than 20 ml/min at 120 bar with reduced flow. For the valve actuation, the proven, certified according to ATEX / IEC Ex solenoid coil of equipment group I + II is used. This allows the use of WDZFA04 and WDZFA06 spool valves in underground mining as well as in open cast installations up to zone 0.

Further details for nominal size NG4 can be found in data sheet 1.3-28, and for nominal size NG6 in data sheet 1.3-42.